Reference : Magnetic Properties of Fe2GeMo3N; an Experimental and Computational Study
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/128421
Magnetic Properties of Fe2GeMo3N; an Experimental and Computational Study
English
[en] Les propriétés magnétiques de Fe2GeMo3N: une étude expérimentale et théorique.
Battle, Peter [Oxford University > Inorganic Chemistry > > >]
Sviridov, L.A. [Oxford University > Inorganic Chemistry > > >]
Woolley, R. J. [Oxford University > > > >]
Grandjean, Fernande mailto [Université de Liège - ULg > Département de physique > Département de physique >]
Long, Gary J mailto [Missouri University of Science and Technology > Chemistry > > >]
Catlow, Richard [Royal Institution London > > > >]
Sokol, A. A. [Oxfor University > > > >]
Walsh, A [Oxford University > > > >]
Woodley, S. M. [Oxford University > > > >]
2012
Journal of Materials Chemistry
Royal Society of Chemistry
22
15606-15613
Yes (verified by ORBi)
International
0959-9428
1364-5501
Cambridge
United Kingdom
[en] Magnetic properties ; Mossbauer spectroscopy
[en] A polycrystalline sample of Fe2GeMo3N has been synthesized by the reductive nitridation of a mixture
of binary oxides in a flow of 10% dihydrogen in dinitrogen. The reaction product has been studied by
magnetometry, neutron diffraction and M€ossbauer spectroscopy over the temperature range 1.8 #
T/K # 700. The electronic properties have been modelled by DFT and Monte Carlo methods.
Fe2GeMo3N adopts the cubic h-carbide structure with a ¼ 11.1630(1) at 300 K. The electrical
conductivity was found to be 0.9 mU cm over the temperature range 80 # T/K # 300. On cooling
below 455 K the compound undergoes a transition to an antiferromagnetic state. The magnetic unit cell
contains an antiferromagnetic arrangement of eight ferromagnetic Fe4 tetrahedra; the ordered atomic
magnetic moments, 1.90(4) mB per Fe atom at 1.8 K, align along a <111> direction. DFT predicts an
ordered moment of 1.831 mB per Fe, albeit with a N eel temperature of >549 K. Monte Carlo
calculations confirm that the experimentally determined magnetic structure is the lowest-energy
antiferromagnetic structure. These results emphasise the potential of these computational methods in
the search for new magnetic materials.
Researchers
http://hdl.handle.net/2268/128421

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